The Fan,vaneaxial, cataloged under National Stock Number 4140-01-657-7982, is classified within Federal Supply Class 4140 (Fans, Air Circulators, and Blower Equipment) of the Refrigeration, AC, and Air Circulating Equipment group. The manufacturer of record is Fantech Inc. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4140-01-657-7982 |
| Primary Part Number | FG 6 |
| Item Name | Fan,vaneaxial |
| FSC / FSG | 4140 / 41 — Fans, Air Circulators, and Blower Equipment |
| Manufacturer | Fantech Inc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| FG 6 PRIMARY | Fantech Inc (USA) |
| Reference | Meaning |
|---|---|
| 8575074 ITEM 13 | C/1 Advisory reference — outside the item-of-supply concept Naval Sea Systems Command |
NSN 4140-01-657-7982 is a Fan,vaneaxial, manufactured by Fantech Inc, classified under FSC 4140, Fans, Air Circulators, and Blower Equipment. Status: active.
NSN 4140-01-657-7982 has 1 manufacturer part number on file: FG 6 (Fantech Inc).
1 possible match (shared part number, not a government interchangeability claim): 6520-01-702-2363. Verify interchangeability with system specifications before substitution.
Key specifications for FG 6: Special Features: SPEED CONTROLLABLE,BUILT IN THERMAL OVERLOAD PROTECTION WITH AUTOMATIC RESET; Part Name Assigned by Controlling Agency: FAN,DUCT INLINE. 0 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.